Exergy Sportsman Replacement CP3 Injection Pump will support up to 650HP on 2001-2016 Duramax applications. For best performance use a 150 GPH or higher lift pump. This modified CP3 offers fueling capabilities up to 4500RPM, where a stock CP3 falls off at 3000RPM. Based off of an LBZ Pump and comes standard with an LBZ FPR, but can be sent with an LB7 or LLY FPR if desired. Custom tuning is required. No Core Fee.